Double-clamping-roller pneumatic chuck with connecting bridge

Abstract

The utility model belongs to the technical field of pneumatic chucks, and particularly relates to a double-clamping-roller pneumatic chuck with a connecting bridge, which comprises a chuck body and a plurality of clamping mechanisms distributed along the circumferential direction of the chuck body. Each clamping mechanism comprises two clamping rollers which are distributed up and down, a driving piece for driving one of the clamping rollers to clamp or loosen and a connecting bridge for connecting the two clamping rollers, and the connecting bridge comprises a bridge body and two cantilevers connected to the two ends of the bridge body; according to the pneumatic chuck, one of the clamping rollers is driven to move through the driving piece, the other clamping roller is driven to move synchronously through the connecting bridge, and therefore synchronous clamping or loosening of the two clamping rollers in the same clamping mechanism is achieved, the structure is simple, cost is low, and miniaturization of the pneumatic chuck can be achieved easily.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic chucks, and particularly relates to a double clamping roller pneumatic chuck with a connecting bridge. Background Technique

[0002] The pneumatic chuck is mainly used for clamping special-shaped pipes such as round pipes, square pipes, and elliptical pipes for a cutting mechanism to cut. It includes a plurality of clamping mechanisms circumferentially distributed and a cylinder for driving the clamping mechanism to move for clamping or loosening. In the prior art, in order to improve the clamping effect on the pipe, a double clamping roller structure is usually adopted. In order to keep the two clamping rollers synchronized, a double-cylinder cylinder or a gear linkage structure is generally used. However, the gear linkage structure is complex, the double-cylinder cylinder has a high cost and a large size, which is not conducive to the miniaturization of the pneumatic chuck. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: to solve the problem that in the prior art, the double clamping roller pneumatic chuck generally adopts a double-cylinder cylinder or a gear linkage structure, etc. However, the gear linkage structure is complex, the double-cylinder cylinder has a high cost and a large size, which is not conducive to the miniaturization of the pneumatic chuck. Now, a double clamping roller pneumatic chuck with a connecting bridge is provided.

[0004] The technical solution adopted by the utility model to solve its technical problem is: a double clamping roller pneumatic chuck with a connecting bridge, including:

[0005] A disk body;

[0006] And a clamping mechanism, having a plurality of them, and the plurality of clamping mechanisms are circumferentially distributed along the disk body. Each clamping mechanism includes two clamping rollers distributed up and down, a driving member for driving one of the clamping rollers to clamp or loosen, and a connecting bridge for connecting the two clamping rollers. The connecting bridge includes a bridge body and two cantilevers connected to both ends of the bridge body.

[0007] Further, at least one connecting bridge is included in each clamping mechanism.

[0008] Further, two connecting bridges are included in each clamping mechanism, and the two connecting bridges are distributed on both sides of the driving member.

[0009] Further, a guiding block is protruded on one side of the connecting bridge close to the driving member, and a guiding groove for the guiding block to slide is opened on the driving member.

[0010] Further, there are four clamping mechanisms, including two relatively arranged transverse clamping mechanisms and two relatively arranged longitudinal clamping mechanisms.

[0011] Further, the two transverse clamping rollers in the transverse clamping mechanism and the two longitudinal clamping rollers in the longitudinal clamping mechanism are cross-distributed.

[0012] Furthermore, a transverse guide rail is provided between two relatively arranged transverse clamping mechanisms, and a longitudinal guide rail is provided between two relatively arranged longitudinal clamping mechanisms, and the transverse guide rail and the longitudinal guide rail are arranged in a staggered manner.

[0013] The beneficial effects of the present utility model are as follows: The present utility model drives one of the clamping rollers to move through a driving member, and drives the other clamping roller to move synchronously through a connecting bridge, thereby realizing the synchronous clamping or loosening of the two clamping rollers in the same clamping mechanism, with a simple structure, low cost and being conducive to the miniaturization of the pneumatic chuck.

[0014] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. Description of the Drawings

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0017] Figure 2 is a top view of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the clamping mechanism from the first perspective;

[0019] Figure 4 is a structural schematic diagram of the clamping mechanism from the second perspective;

[0020] Figure 5 is a structural schematic diagram of the clamping mechanism after removing the transverse guide rail and the longitudinal guide rail;

[0021] In the figure:

[0022] 1. Disc body; 101. Clamping opening;

[0023] 2. Clamping mechanism; 201. Transverse clamping roller; 202. Longitudinal clamping roller; 203. Driving member; 2031. Guide groove; 204. Connecting bridge; 2041. Bridge body; 2042. Cantilever; 2043. Guide block; 205. Transverse guide rail; 206. Longitudinal guide rail. Detailed Embodiments

[0024] The present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model. Directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalents.

[0025] As Figure 1 and Figure 2 shown, a pneumatic chuck with a connecting bridge and double clamping rollers includes a disk body 1 and a plurality of clamping mechanisms 2;

[0026] The cross-section of the disk body 1 is circular, and a clamping opening 101 for the pipe to enter is provided at its central part;

[0027] A plurality of clamping mechanisms 2 are circumferentially distributed along the clamping opening 101. Each clamping mechanism 2 includes two clamping rollers distributed vertically, a driving member 203 for driving one of the clamping rollers to clamp or release, and a connecting bridge 204 for connecting the two clamping rollers. The driving member 203 is a cylinder, and the output end of the cylinder is connected to the lower clamping roller (the "upper" and "lower" are relative, the "lower" is the side close to the disk body, and the "upper" is the side far from the disk body). As Figure 5 shown, the connecting bridge 204 includes a bridge body 2041 and two cantilevers 2042 connected to both ends of the bridge body 2041. The three are integrally formed. The two cantilevers 2042 are distributed vertically. One end of the cantilever 2042 is connected to the bridge body 2041, and one end is fixed to the roller seat for installing the clamping roller by a pin or a screw;

[0028] When the driving member 203 is activated, it drives the lower clamping roller connected to it to move for clamping or releasing. At the same time, under the action of the connecting bridge 204, the upper clamping roller moves synchronously with the lower clamping roller, so that the double clamping rollers of the same clamping mechanism 2 act synchronously. This structure can achieve the synchronous clamping of the two clamping rollers only through the connecting bridge 204, with a simple structure, avoiding the problems of high cost and large size brought by the double-cylinder cylinder.

[0029] In some examples, each clamping mechanism 2 includes at least one connecting bridge 204 to make the double clamping rollers in each clamping mechanism 2 act synchronously.

[0030] In some examples, each clamping mechanism 2 includes two connecting bridges 204. The driving member 203 is located in the middle, and the two connecting bridges 204 are distributed on both sides of the driving member 203 and symmetrically arranged. Therefore, the three are spaced along the axial direction of the clamping roller, so as to ensure that the two clamping rollers will not shift during the movement and remain completely synchronous.

[0031] In some examples, a guiding block 2043 protrudes from a side of the connecting bridge 204 close to the driving member 203. The guiding block 2043 can be integrally formed with the connecting bridge 204, or the guiding block 2043 is separately arranged from the connecting bridge 204 and fixed by bolts or pins. A guiding groove 2031 for the guiding block 2043 to slide is formed on the driving member 203, and a side of the bridge body 2041 away from the clamping roller is arranged as an inclined surface so as not to protrude from the outer peripheral wall of the disc body 1, preventing interference with other components during the installation of the pneumatic chuck; when the driving member 203 drives one of the clamping rollers to move, the connecting bridge 204 is driven to move, and at the same time the connecting bridge 204 drives the other clamping roller to move. The cooperation between the guiding block 2043 and the guiding groove 2031 can ensure the linear movement of the connecting bridge 204 and prevent it from skewing.

[0032] In some examples, there are four clamping mechanisms 2, including two relatively arranged transverse clamping mechanisms and two relatively arranged longitudinal clamping mechanisms. The two transverse clamping mechanisms 2 and the two longitudinal clamping mechanisms 2 clamp the pipe from the transverse and longitudinal directions respectively; a synchronization mechanism for driving the two transverse clamping mechanisms to move synchronously is arranged between the two transverse clamping mechanisms, and a synchronization mechanism for driving the two longitudinal clamping mechanisms to move synchronously is also arranged between the two longitudinal clamping mechanisms to achieve self-centering of the pneumatic chuck. The synchronization mechanism includes pulleys and a synchronous belt wound around the pulleys, and the synchronous belt is a steel belt.

[0033] In some examples, the two transverse clamping rollers 201 in the transverse clamping mechanism and the two longitudinal clamping rollers 202 in the longitudinal clamping mechanism are cross-distributed. Compared with the parallel distribution, the cross-distributed clamping rollers can improve the straightening effect on small workpieces. However, the cross-distributed clamping rollers will increase the size of the pneumatic chuck. At this time, if two cylinders are used for driving, the size of the pneumatic chuck will be further increased, resulting in a longer remaining length of the pipe left in the pneumatic chuck, causing great waste. Therefore, in this application, the connecting bridge 204 is used to realize the synchronous movement of the two clamping rollers in the same clamping mechanism 2 to reduce the size of the pneumatic chuck.

[0034] In some examples, a transverse guide rail 205 is arranged between the two relatively arranged transverse clamping mechanisms, and a longitudinal guide rail 206 is arranged between the two relatively arranged longitudinal clamping mechanisms. The transverse guide rail 205 and the longitudinal guide rail 206 are arranged in a staggered manner. The transverse guide rail 205 guides during the clamping or loosening process of the transverse clamping roller 201, and the longitudinal guide rail 206 guides during the clamping or loosening process of the longitudinal clamping roller 202. A space for the transverse guide rail 205 or the longitudinal guide rail 206 to pass through is left between the two cantilevers 2042.

[0035] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double-clamping roller pneumatic chuck with a connecting bridge, characterized in that: include: Plate (1); and a clamping mechanism (2), comprising a plurality of clamping mechanisms (2), the plurality of clamping mechanisms (2) being distributed along the circumference of the disk body (1), each clamping mechanism (2) comprising two clamping rollers distributed in an upper and lower direction, a driving member (203) for driving one of the clamping rollers to clamp or release, and a connecting bridge (204) for connecting the two clamping rollers, the connecting bridge (204) comprising a bridge body (2041) and two cantilevers (2042) connected at both ends of the bridge body (2041).

2. The pneumatic chuck with double clamping rollers having a connecting bridge according to claim 1, wherein: Each clamping mechanism (2) includes at least one connecting bridge (204).

3. The pneumatic chuck with double clamping rollers having a connecting bridge according to claim 1, characterized in that: Each clamping mechanism (2) includes two connecting bridges (204), and the two connecting bridges (204) are distributed on both sides of the driving member (203).

4. The pneumatic chuck with double clamping rollers having a connecting bridge according to claim 1, characterized in that: A guide block (2043) is protruded from one side of the connecting bridge (204) close to the driving member (203), and a guide groove (2031) for the guide block (2043) to slide is provided on the driving member (203).

5. The pneumatic chuck with double clamping rollers having a connecting bridge according to claim 1, characterized in that: The clamping mechanisms (2) are four in number and include two oppositely arranged transverse clamping mechanisms and two oppositely arranged longitudinal clamping mechanisms.

6. The pneumatic chuck with double clamping rollers having a connecting bridge according to claim 5, wherein: The two transverse clamping rollers (201) in the transverse clamping mechanism and the two longitudinal clamping rollers (202) in the longitudinal clamping mechanism are cross-distributed.

7. The pneumatic chuck with double clamping rollers having a connecting bridge according to claim 6, characterized in that: A transverse guide rail (205) is provided between the two oppositely arranged transverse clamping mechanisms, and a longitudinal guide rail (206) is provided between the two oppositely arranged longitudinal clamping mechanisms, and the transverse guide rail (205) and the longitudinal guide rail (206) are arranged in an alternating manner.

Images